Beneath Vortigern'sLake, a
spaceship has rested for centuries, and at it's heart
is the legendary King Arthur and his sword Excalibur. The sword calls out
forwards, backwards, and sideways in time, summoning warriors, the sorceress Morgaine, and the Doctor, who is surprised to hear everyone
calling him Merlin. Even with help from UNIT and his old friend Brigadier
Lethbridge-Stewart, can the Doctor prevent the
struggle for the sword and Arthur from destroying the world?

starring Sylvester McCoy as the Doctor, Sophie Aldred as Ace, and Nicholas Courtney as Brigadier Lethbridge-Stewart. Written by Ben Aaronovitch, Produced by John Nathan-Turner, and Directed
by Michael Kerrigan.

Originally transmitted from 6 September 1989 to 27 September 1989 on BBC1.

DVD Features:

On Disc 1:

-All four 25-minute episodes (the original 1989
versions) with full restoration treatment.

-Graphical menus, episode and scene selection features,
and subtitles for the hearing impaired.